During the Rolling Stones’ final set, 18-year-old Meredith Hunter and others tried to jump onstage. A member of the Hells Angels, who were hired to protect the stage for $500 worth of beer, got into a scuffle with Hunter. Jagger stopped the song and told the crowd to “cool out.” In the huge melee, Hunter allegedly pulled out a handgun and was fatally stabbed by a biker.

Film crews captured the killing, and the violent scene was featured prominently in the documentary “Gimme Shelter.”

Altamont came to be viewed as the symbolic end to the 1960s peace and love era.